Minor fix + isEmpty() method for PropertyPanel.

modules/juce_gui_basics/properties/juce_PropertyPanel.cpp

@@ -197,7 +197,7 @@ PropertyPanel::~PropertyPanel()
 //==============================================================================
 void PropertyPanel::paint (Graphics& g)
 {
-    if (propertyHolderComponent->getNumSections() == 0)
+    if (isEmpty())
     {
         g.setColour (Colours::black.withAlpha (0.5f));
         g.setFont (14.0f);
@@ -215,16 +215,21 @@ void PropertyPanel::resized()
 //==============================================================================
 void PropertyPanel::clear()
 {
-    if (propertyHolderComponent->getNumSections() > 0)
+    if (! isEmpty())
     {
         propertyHolderComponent->clear();
-        repaint();
+        updatePropHolderLayout();
     }
 }
 
+bool PropertyPanel::isEmpty() const
+{
+    return propertyHolderComponent->getNumSections() == 0;
+}
+
 void PropertyPanel::addProperties (const Array <PropertyComponent*>& newProperties)
 {
-    if (propertyHolderComponent->getNumSections() == 0)
+    if (isEmpty())
         repaint();
 
     propertyHolderComponent->addSection (new SectionComponent (String::empty, newProperties, true));
@@ -237,7 +242,7 @@ void PropertyPanel::addSection (const String& sectionTitle,
 {
     jassert (sectionTitle.isNotEmpty());
 
-    if (propertyHolderComponent->getNumSections() == 0)
+    if (isEmpty())
         repaint();
 
     propertyHolderComponent->addSection (new SectionComponent (sectionTitle, newProperties, shouldBeOpen));

modules/juce_gui_basics/properties/juce_PropertyPanel.h

@@ -84,6 +84,9 @@ public:
     /** Calls the refresh() method of all PropertyComponents in the panel */
     void refreshAll() const;
 
+    /** Returns true if there no properties have been added. */
+    bool isEmpty() const;
+
     //==============================================================================
     /** Returns a list of all the names of sections in the panel.